User manual

Page 59
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
PSI 9000 DT Series
3.6 Alarms and monitoring
3.6.1 Denition of terms
There is a clear distinction between device alarms (see „3.3. Alarm conditions“) such as overvoltage protection
oroverheatingprotection,anduserdenedeventssuchasOVD (overvoltage detection). Whilst device alarms
servetoprotectthedeviceandtheconnectedloadbyinitiallyswitchingofftheDCoutput,userdenedeventscan
switch off the DC output (Action = ALARM), but can also simply give an acoustic signal to make the user aware.
Theactionsdrivenbyuserdenedeventscanbeselected:
Action Impact Example
NONE Userdenedeventisdisabled.
SIGNAL
On reaching the condition which triggers the event, the action SIGNAL will
show a text message in the status area of the display.
WARNING
On reaching the condition which triggers the event, the action WARNING
will show a text message in the status area of the display and pop up an
additional warning message.
ALARM
On reaching the condition which triggers the event, the action ALARM will
show a text message in the status area of the display with an additional alarm
pop-up, and additionally emit an acoustic signal (if activated). Furthermore
the DC output is switched off. Certain device alarms are also signalled to
the analog interface or can be queried via the digital interface.
3.6.2 Device alarm and event handling
A device alarm incident will usually lead to DC output switch-off. Some alarms must be acknowledged (see below),
which can only happen if the cause of the alarm is not persistent anymore. Other alarms acknowledge themselves
if the cause has vanished, like the OT and the PF alarm.
► How to acknowledge an alarm in the display (during manual control)
1. If the alarm is indicated as a pop-up, tap OK.
2. If the alarm has already been acknowledged, but is still displayed in the status area,
thenrsttapthestatusareatodisplaythepop-up,andthenacknowledgewithOK.
In order to acknowledge an alarm during analog remote control, see „3.5.4.5. Overview of the Sub-D Socket“. To
acknowledge in digital remote, refer to the external documentation “Programming ModBus & SCPI”.
Somedevicealarmsarecongurable:
Alarm Meaning Description Range Indication
OVP
OverVoltage
Protection
Triggers an alarm if the DC output voltage reaches the
denedthreshold.TheDCoutputwillbeswitchedoff.
0 V...1.1*U
Nom
Display, analog
IF, digital IF
OCP
OverCurrent
Protection
Triggers an alarm if the DC output current reaches the
denedthreshold.TheDCoutputwillbeswitchedoff.
0 A...1.1*I
Nom
Display, digital
IF
OPP
OverPower
Protection
Triggers an alarm if the DC output power reaches the
denedthreshold.TheDCoutputwillbeswitchedoff.
0 W...1.1*P
Nom
Display, digital
IF